Analysis of Prestressed Concrete Cylinder Pipes with Fiber Reinforced Polymer

摘要

Prestressed concrete cylinder pipe is widely used for water distribution but structural failures have happened due to deterioration and a significant amount of money has been spent every year for repair and replacement. As the robot technique with fiber reinforced polymer to rehabilitate is being developed, a need for a new analysis method that can tell how many layers are required for a certain deterioration level has arisen. Currently, no analytical tool is available for this purpose. In this study, an analysis procedure is proposed to predict the pressure and the radial displacement relation and the bursting capacity of prestressed concrete cylinder pipes under internal loading. The finite element method is used to validate the proposed method. It is found that the debond of prestressing wire, the number of the reinforcing layers, and the layer attachment angle are important factors to pipe capacity.